Instructions Review and Pinout Report
Worked for 1 min 16 sec
Terminal labels and properties are updated; I’m verifying the final schematic pins and footprint against the QFN20 datasheet now.
Thought for 43 sec
Updated in schematic component:
- Renamed remaining wrong terminals:
PB5pin 6 ->VCC,VIO33pin 7 ->PB5,EPAD / Exposed Pad->EPAD. - Set all 21 terminals with datasheet-based Section, Terminal Order, Pin Orientation, Pin Type, and Pin Description.
Terminal Order / Section / orientation changes:
Power, order 1:VCC, orientationTop.Reset/Debug, order 2:PC0-NRST,PB6(SWDIO),PA2(SWCLK), orientationLeft.Clock, order 3:PC1-OSCIN,PB7-OSCOUT, orientationLeft.Communication, orders 4–6: SPI/I2C/USART-capable GPIO pins, orientationLeft.GPIO, order 7:PB2,PB0, orientationLeft.Ground, order 8:VSS,EPAD, orientationBottom.
Footprint check result:
- Matches datasheet QFN20-EP intent: 20 perimeter pads + center exposed pad, 0.4 mm pitch, 3×3 mm body, 1.7×1.7 mm exposed pad.
- Footprint issue / uncertain: Flux layout also shows 4 extra unnamed internal pad nodes, likely paste/mount sub-pads, but they should be manually confirmed as non-electrical paste features.
Short summary:
- OK: datasheet pin count and main pad geometry match.
- Renamed: 3 terminals.
- Uncertain: EPAD electrical tie to VSS is not explicitly confirmed in extracted datasheet text; 4 unnamed internal footprint pads need manual confirmation.
- Footprint issue: no blocking mismatch found, only the unnamed internal pads require review.
Fix footprint and review
Fix footprint pads
Verify EPAD connection
Run ERC DRC
Create pinout doc
